The likelihood of health care workers having contact with surfaces during patient care was developed
from surface contact data accrued during an observational study carried out at a National Health
Service (NHS) single-bed accommodation hospital ward during the first quarter of 2012. Health care
workers were observed during episodes of care categorised into six areas described in Table 3,
following standardised categories set out in Pittet et al. (1999) and Dancer et al. (Dancer et al., 2010)